Note 16 - The Financing and Warrant Liabilities - Warrant Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance (in shares)	774,000	774,000
Exercisable (in shares)	774,000	774,000
Issued (in shares)	2,030,865
Issued, weighted average remaining contractual life (Year)	3 years
Issued, weighted average exercise price (in dollars per share)	$ 2.03
Issued, exercisable (in shares)
Exercisable, weighted average remaining contractual life, issued (Year)
Issued, weighted average exercise price (in dollars per share)
Expired (in shares)	(645,000)
Exercised (in shares)
Weighted average remaining contractual life (Year)	2 years 284 days	229 days
Weighted average exercise price (in dollars per share)	$ 2	$ 14,927
Exercisable, weighted average remaining contractual life (Year)	18 days	229 days
Exercisable, weighted average exercise price (in dollars per share)	$ 14,927	$ 14,927
Expired, weighted average exercise price (in dollars per share)	$ 14,927
Balance (in shares)	2,159,865	774,000
Exercisable (in shares)	129,000	774,000